Check the listing for details. Nano-Tech Bio-Plug Frag Plugs (25 pk) - Maxspect. Condition: New. Listed at 13.19 USD. Nano-Tech Bio-Plugs don't just hold coral frags—they help filter water and feed corals! These are no ordinary frag plugs! They are Maxspect Nano-Tech Bio-Plugs—which are made out of the same porous ceramic beads as Maxspect’s popular Bio-Blocks and Bio-Spheres. So sure, they look cool. And sure, the embossed Maxspect logo on top is a nice touch. But the real selling point with these plugs is that they also serve as bio-media! Beneficial bacteria can colonize inside and on the surface of the plugs which helps keep your tank clean. Since Bio-Plugs are full of pores that are permeable by water, they actually make it easier for corals to extract nutrients from the water column compared to standard, run-of-the-mill frag plugs. Maxspect Nano-Tech Frag Plugs are truly in a class of their own. They are the first frag plug that actually helps grow corals faster and healthier! Features We Love: Purpose-built for maximum efficiency with a clever 2-in-1 design: it holds frags and filters water! It's made from the same porous ceramic structure as Maxspect's hugely popular Bio-Blocks and Bio-Spheres Nano-Tech Bio-Plugs fit in most standard frag holders, racks, rocks, and coral transporters—you don't have to buy anything extra or proprietary to use them You can use these multi-purpose frag plugs with another multi-purpose Maxspect invention: the Maxspect Fragnifier! Listing and template services provided by inkFrog